Process for the manufacture of bituminous emulsions.



w. M. FRASER. PROCESS FOR THE MANUFACTURE OF BITUMINOUS EMULSIONS.

APPLICATION FILED OCT-24. 1917- 1,258,103. r Patented Map. 5,1918.

WILLIAM H. FRASER, 03F WOODPRIDGE, NEW JERSEY, ASSIGNOR TO THE BARBER ASPHALT PAVING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPO- BATION Q15 WEST VIRGINIA.

PBOC ESS FOB TEE MANUFACTURE 015 BITUMINOUS EMULSIONS.

To all whom it may concern:

Be it known that I, WILLIAM M. FRASER, a, citizen of the United States, and a resident of Woodbridge, in the county of Middlesex and State of New Jersey, have invented certain new and useful Improvements in Processes for the Manufacture of Bituminous Emulsions, whereof the following is a specification, reference being had to the accompanying drawings.

.My invention relates to bituminous emulsions such as are used in the paving and roofing arts. They are useful because the emulsion being miscible with water in all proportions, may be brought to any required degree offlfiuidity. Their composition must be such that after a time, they become, as the result of evaporation, im-

miscible in water, and, therefore, useful as.

a waterproof hinder or cement.

In or er to secure a bituminous emulsion useful for these purposes having these qualities, it is necessary to obtain a'very thorough emulsification, and on a comparatively large scale. My invention relates to a process for accomplishing this, which is both economical and practical,,and it has for its characteristic the simultaneous pumping and mixing of the bituminous substance and the soapy substance, whereby the two are mixed in proper proportions, and their continued pumping after being thus mixed untll the required emulsion is secured.

In the practice of my process I find it convenient to employan apparatus, such as I have shown in the accompanying drawings, in which Figure I, is a plan view and Fig. II, an elevation of suchapparatus.

In this apparatus three containers are mounted in close proximity to each other. These are a bitumen tank 1, a soap tank 2, and a tank 3. By suitable valved pipe connections 4, 4, 4, 4, all of these tanks are connected with the suction end of a pump 5. The delivery end of this pump discharges through a'pipe 6, into the top of the mixing tank. There is also provided a pipe 7, for a water supply to the mixing tank.

I W111 now describe a typical process of making a; bituminous emulsion in accordance Specification of Letters Patent.

Patented Mar. 5, 1918.

Application filed October 24, 1917. Serial No. 198,299.

with my invention, it being understood that the materials and proportions may be varied, and that the data are given by way of example, rather than by way of limitation.

In order to conveniently and cheaply pre pare a bituminous emulsion, consisting of a mixture of semi-liquid bitumens or of oils, and watery solutions of soap which will not separate between the freezing and'boiling point of water in less than thirty days, and which are miscible in all proportions with water, I take, for instance, Mexican residuum, after the naphthas and burning oils, etc., have been removed, and warm it in tank 1, to a temperature of 180 to 190 F. I take caustic soda, 2.3 parts and fresh water 5.7 parts, and prepare a soda solution having a gravity of 35 Baum. .To this soda solution I then add in small increments 4.5 gallons of rosin oil per each .75 gallon soda solution'and stirthe batch actively until a smooth solution of soap is produced. To this, soap solution I then add 5.5 gallons of additlonal water and the final and finished soap solution, then has a gravity of approximately 1.1 Baum. This is placed in tank 2. 4

Having thus provided a supply of asphaltic residuum and of soap solution in tanks 1, and 2, respectively, I pass these. simultaneously through the pump 5, preferably in the proportion of 75.5 gallons residuumto 11 gallons soap solution. This mixing operation is begun by opening the cock of the container 1, as well as the cock of the container 2, to such a degree that when the pump is started,'it will draw both residuum and soap solution simultaneously and in the desired proportions, and pass them through themixing operation by drawing the mixed solution from the 'bottom of the mixing tank and again discharging it into the top. While this circulation of the mixture is taking place, an additional quantity of water, say

'30 or 35 gallons, is gradually added. di- ;rectly to the mixtureby means of the pipe 7.

An alternative method of procedure which I I have also foundvery succesful is the followin Having prepared the bituminous material and the soap solution in their respective tanks, in quantities representing the ultimate proportions of the mixture which is desired, I first pump the entire soap solution into the' empty mixing tank. Suction is thereupon taken from the bottom of the mixing tank and simultaneously from the 'sults.

In either: case the pumping, and, therefore, the mixing operation is continued until the emulsion when tested with a drop of water turns to a light brown color at the point of contact. Havingthus claim:' r

1. The process of making a bituminous from their respective containers a them simultaneouslythrough the pump and back to a mixing tank, drawing the mixture described my invention, 1

emulsion, which consists in simultaneously umping liquidbitumen and an emulsifier, passing ofi again from themixing tank to the pump and back again until the entire solution hasreached the proper stage of emulsification as a result 0 continuous pumping.

.2. The process of making a bituminous emulsion, which consists in pumping a soa y solution from its tank an simultaneous y a pumping a liquid bitumen so that. the two unite before passin through the pump.

In testimony w ereof I have hereunto ed my name, at Philadelphia, Penm this twenty-second day of Octos1 sy Vania, ber, 1917.

WlLL'IAM M,FRASE1.1 I 

